Loom beam



n. THoRNToN. LOOM BEAM. APPL'xcAnoN FILED Nqv. 24, 1920.

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LOOM BEAM.

Application filed November 24, 1920. Serial No. 426,146.

T Zlio/10m t may concern Be it known that l, RAY THORNTON, a citizen etthe United States, and a resident of New Bedford, in the county otBristol and State oiE ll/lassachusetts, have invented a new and usefulimprovement in Loom Beams, oil which the Yfollowing is a specification.

My invention relates to loom beams upon which the warp threads are woundand from which they are supplied to the loom during the process etweaving, and its object is to provide a simple and convenient meanswhereby the degree of restraint to which the threads are subjected asthey are unwouncl trom the loom beam may readily be changed inaccordance with the requirements oit the worl; without substituting onebeam-head ior another.

l-leretotore .loom beam heads have been formed integral with pulleys ofdifferent sizes over which a belt or chain having one end iixed and theother weighted, is passed. In order to vary the restraint to which thethreads are subjected during the winding operation, as when there is achange in the material to be woven the amount of weight suspended on theloose end of the brake band is clninged. Sometimes however it isimpossible to put snliicient weight on the brake band for a pulley ei agiven size to s cure the requisite degree ot restraint. ln such cases itis necessary to remove the head with its attached friction device andreplace the same by another head having a pulley ot different width ordiameter.

By means oit my invention different da grecs of restraint may be putupon the thread by the simple expedient ofi removing one pulley andreplacing the same with another of dil'lierent width or diameter.

My invention, comprises, essentially, a beam-head and a friction device,such as a pulley, which is removable from, and inden pendent of, saidhead, together with means whereby it may readily be removed from, andattached to, said head without removing such head from, or disturbingits attachment to the barrel.

An illustrative embodiment of my invention is shown in the drawingswhich accompany and 'form a part ot this specification, in which- Figure'l is a longitudinal section oi one end olA a loom beam embodying myinvention. Fig. 2 is a transverse section taken on the line 2-2 of Fig.1, and Fig. 3 is an end view.

ln the particular drawings selected iter more iully disclosing theprinciple oit my invention, 1f) represents the barrel which may be ofany suitable construction and to each end of which. is attached a head11, preferably built up of a plurality of layers of wood, eachconsisting of several bands as described in my Patent No. 1,239,744,dated September 11, 1917, although, oi course, it will be understoodthat I do not limit niyseli1 in this particular, inasmuch as heads ofany suitable construction may be employed. The heads are lixedly securedto the barrel by bolts 12, herein shown as three in number', the innerend oi each of which is threaded to anut 13 embedded in a slot in thebarrel, such slot being' closed by a plug 14, The outer end of each boltpasses through and projects from the head, and nuts 15 threaded theretoengage the outer tace of the head, thereby tightly clamping` the latteragainst the barre A pulley 16 having its inner tace countern bored toreceivethe nuts 15is held against the outer face of one of the heads 11by means of nuts 17, threaded to the outer ends of the bolts 12.

Preferably the end oli' each bolt is provided with a hert 18 tofacilitate the screwing oi. the same into its co-operating nut 13 andthe head, it oit the type herein shown, preferably is provided with ametallic rim 19 to bind the layers of wood together at their outeredges. The outer tace of the pulley may be provided with a rib 20 forengagement with the vfinger whereby the loom beam is rotated. about itsaxle 21. lt will be understood, however, that any suitable means may beemployed both for detachably securing the pulley or other -frictiondevice to the loom beam and for co-operation with the actuating member.

Over the pulley is passed a belt 22, one end oli' which is fixed and theother weighted, for the purpose et placing the necessary restraint uponthe threads during the process of weaving.

Then the nature of the wort: requires change in the amount ot restraintplaced on the threads as they are unwound, the triction device may beeasily removed and threaded. engagement with said bolts, re speotively,nuts threaded to said bolts respectively and engaging the outer taceoi"Y seid headj a pulley having its inner face resting' against saidhead, and nuts threaded to said bolts and engaging the outer tace otsaid pulley.

In testimony whereof, l, have hereunto subscribed my name this 22nd dayof November7 1920.

RAY THORNTON.

